Patents for G01L 13 - Devices or apparatus for measuring differences of two or more fluid pressure values (2,634) |
---|
01/28/1992 | CA1294794C Method and apparatus for automatic offset compensation in parameter-sensing transducer systems |
01/14/1992 | US5081448 Differential pressure indicator with temperature compensation |
01/14/1992 | US5079953 Pressure gage |
12/24/1991 | US5074148 Resonance frequency liquid level sensor |
12/18/1991 | CN1015133B Differential pressure sensor |
12/18/1991 | CN1015132B Differential pressure transducer |
12/11/1991 | EP0460498A2 Automatic transducer selection system for pressure measurement |
12/10/1991 | US5070736 Differential pressure sensor with read-out device |
12/10/1991 | CA1293006C Adjustable range spring for differential pressure responsive devices |
12/05/1991 | CA2043688A1 Automatic transducer selection system for pressure measurement |
12/04/1991 | CN1056747A Transducer for measuring pressure |
11/13/1991 | CN1014744B Split-seconds type silicon varistor pulsating flow rhysimeter probe |
11/12/1991 | US5063783 Pressure monitoring and method |
11/06/1991 | EP0454972A2 A high gain differential-to single ended amplifier having a tee network feedback loop |
11/06/1991 | CN2088248U Double diaphragm optical fiber differential pressure pickup |
10/29/1991 | US5061832 Field settable differential pressure switch assembly for low fluid pressure applications |
10/17/1991 | WO1991015743A1 Differential pressure sensor and method of manufacturing the same |
10/15/1991 | US5056369 Capacitive differential pressure detector |
09/03/1991 | CA1288294C Pressure differential indicator with non-mechanical thermal lockout |
08/28/1991 | CN1013712B Differential-pressure sensor |
08/27/1991 | US5042308 Electrostatic capacitance type pressure detector |
07/30/1991 | US5035145 Differential manometer pressure gage |
07/24/1991 | EP0438373A2 Differential pressure gauge |
07/17/1991 | CN1013224B Isolator apparatus |
07/03/1991 | EP0434818A1 Apparatus and method for measuring reservoir pressure changes |
06/25/1991 | US5027081 High gain differential-to-single ended amplifier having a tee network feedback loop |
06/19/1991 | EP0432669A2 Method and device for monitoring the air pressure in railway carriages |
06/18/1991 | US5024100 Automatic transducer selection system for pressure measurement |
06/12/1991 | EP0431345A2 Probe for measuring pressure of a fluid flowing in a pipe |
05/07/1991 | US5012677 Differential pressure transmitter |
04/18/1991 | WO1991005232A1 Capacitive pressure transducer system |
04/10/1991 | EP0421394A2 Differential pressure measuring device |
04/03/1991 | EP0420105A2 Differential pressure measuring device with autocontrol |
04/03/1991 | CN1050440A 差压传感器 Differential Pressure Sensor |
03/27/1991 | CN1012217B Semiconductive force transferring apparatus |
03/20/1991 | EP0417317A1 Differential pressure gauge |
03/19/1991 | US5000048 Circuit arrangement for temperature compensation of capacitive pressure and differential pressure sensors |
02/27/1991 | CN2072223U U-tube differential manomete with precision scale |
02/26/1991 | US4995266 Differential pressure transmitter |
02/20/1991 | EP0413086A1 Electro-acoustic transducer |
02/19/1991 | CA1280291C Differential pressure transducer |
02/06/1991 | EP0411230A1 Pressure measuring device |
02/05/1991 | CA1279772C Dual diaphragm differential pressure transducer |
01/30/1991 | CN2070441U Differential pressure device for monitoring cavity sealing function |
01/29/1991 | US4987782 Capacitive pressure transducer system |
01/22/1991 | US4986127 Multi-functional sensor |
01/10/1991 | WO1991000415A1 Apparatus and method for measuring reservoir pressure changes |
01/02/1991 | EP0405633A2 Pressure/Differential measuring device |
01/02/1991 | CN1011073B Flangeless transmitter coupling to flange adapter union |
11/28/1990 | CN1047420A Manufacture method and structure of monocrystalline-silicon pressure transducer |
11/27/1990 | US4972716 Semiconductor pressure converting device |
10/31/1990 | EP0395200A1 Method and system for determining vapor pressure of liquid compositions |
10/30/1990 | CA1275579C Pressure indicating device |
10/17/1990 | EP0392272A1 Measuring and/or controlling device for fluid flow and/or quantities of heat |
10/17/1990 | EP0392271A1 Measuring device for fluid flow and/or quantities of heat |
10/10/1990 | CN2063638U Differential pressure transducer |
10/04/1990 | WO1990011503A1 Differential pressure gauge |
10/03/1990 | CN2063232U Measurer for ultramicro-pressure |
09/26/1990 | EP0316343A4 Media isolated differential pressure sensors |
09/26/1990 | EP0312532A4 Differential pressure sensor |
09/19/1990 | EP0323963A4 Flangeless transmitter coupling to a flange adapter union |
09/18/1990 | US4957001 Apparatus and method for measuring reservoir pressure changes |
09/18/1990 | CA1274102A1 Self-zeroing pressure transmitter with automatic pressure manifold |
08/29/1990 | CN2061281U Ultramicro differental pressure transmitter |
07/11/1990 | EP0164413B1 Pressure transducer |
07/04/1990 | EP0376631A1 Differential capacitive pressure sensor with over-pressure protection and method of providing over-pressure protection to a capacitive pressure sensor |
06/05/1990 | CA1269861A1 Pressure transmitter housing |
05/30/1990 | EP0177491B1 Pressure compensated differential pressure sensor and method |
05/03/1990 | WO1990004701A1 Solid state differential pressure sensor with overpressure stop and free edge construction |
04/20/1990 | CA2001047A1 Solid state differential pressure sensor with overpressure stop and free edge construction |
04/04/1990 | EP0361590A2 Temperature-compensating circuitry for capacitive pressure or pressure difference transducers |
03/21/1990 | CN1040682A Differntial pressure transducer |
03/21/1990 | CN1040681A Semiconductive force transferring apparatus |
03/20/1990 | US4909083 Pressure/differential pressure measuring device |
03/06/1990 | US4905575 Solid state differential pressure sensor with overpressure stop and free edge construction |
03/06/1990 | US4905505 Method and system for determining vapor pressure of liquid compositions |
01/23/1990 | US4895026 Semiconductor pressure sensor |
01/02/1990 | US4890497 In a control loop for process control |
12/13/1989 | CN1037964A Resistance strain-type differential pressure sensor |
11/07/1989 | US4879627 Differential capacitive pressure sensor with over-pressure protection |
11/07/1989 | US4878385 Differential pressure sensing apparatus |
11/02/1989 | EP0339981A2 Laminated semiconductor sensor with overpressure protection |
10/04/1989 | CN1036076A 差压传感器 Differential Pressure Sensor |
09/27/1989 | EP0334611A2 Pressure transmitter assembly |
09/13/1989 | EP0331772A1 Differential pressure meter for bidirectional flows of gas |
08/09/1989 | EP0327524A2 Differential pressure sensing apparatus |
07/19/1989 | EP0323963A1 Flangeless transmitter coupling to a flange adapter union. |
07/19/1989 | CN1034060A Dual sided pressure sensor |
07/13/1989 | WO1989006350A1 Differential pressure meter |
07/06/1989 | DE3821690A1 Device for the measurement of small pressure differences |
06/27/1989 | US4841777 Pressure transmitter assembly |
06/27/1989 | US4841776 Differential pressure transmitter |
06/21/1989 | EP0321097A2 Pressure sensors |
05/30/1989 | US4833920 Differential pressure sensor |
05/24/1989 | EP0317532A1 Pressure indicator |
05/24/1989 | EP0316343A1 Media isolated pressure sensors. |
05/16/1989 | US4829826 Differential-pressure transducer |
05/09/1989 | US4827772 Differential pressure sensing means and method |
04/26/1989 | EP0312532A1 Differential pressure sensor. |
04/25/1989 | US4823604 Pressure transducer assembly |